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Japanese Dragonflies of the Family Calopterygidae with the Descriptions of Three New Species and One New Subspecies

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Japanese Dragonflies of the Family Calopterygidae with the Descriptions of Three New Species and One New Subspecies Japanese Dragonflies of the Family Calopterygidae with the Descriptions of Three New Species and One New Title Subspecies Author(s) OGUMA, Kan. Citation The journal of the College of Agriculture, Tohoku Imperial University, Sapporo, Japan, 5(6), 149-163 Issue Date 1913-08-20 Doc URL http://hdl.handle.net/2115/12516 Type bulletin (article) File Information 5(6)_p149-163.pdf Instructions for use Hokkaido University Collection of Scholarly and Academic Papers : HUSCAP 'J~p~nesecDragonflies 'of the Fatt:lily, C~lopter,yg~~ae ," ,1".[ " . " with the Descripttonsof _~ r .,; \: ,,; ~"':. "'-. " Three .New .Species and One, New' Subspecies. By· . Ran Oguma, This paper is based chiefly upon the Shldy of th~ sp~cimens pre:"e-!-,':~-? in the entomological laboratory of the college and partlY,also of my. ,o,wn collection as weI1 as of those sent by my friends fro~ different 'parts .of .;Tapan. The species recorded as indigenous to Japan by previous 3lLthors are elcwll in llumpe.r, . but my presellt study shows, that six more species ,W'cur .in our country. Of these 17 species five are found ill Japal;t proper­ frO\ll Hokkaido to Kiu5hill; while the rest are exdllsively .confined"to, ~u~­ ,tropical partil of Japan - Loo-Choo, Form03a and Bonin Is!and~. Fortlte sake of cOllveniellee, they will be called respectively palaearcti? ~'ld subtr?}1jcal ,~peeies. in the descriptions of this paper. They are as follows:- 1. Palaearcticspecies. 1. Calopte1"!p' virgoLIN:N~US. ... .... .. ... .,.;- Japan, Europ~. 2. C. cornelia SE(.YS. .' ... .... ..•........... Jap~~l. 3. C. atl'ata SELYS. .. .. , ......... ,." ... , ... : J!l~an. 4.JJiiwis stl"igata RAG EX. ...... ............ , .... Japan. ,5. fo[aeopfdcMa. svpre8tes SEL vs. II. Subtropical species. 6. JJlal1'oha nigripectus SELYS. ,.. ............ ......... Formosa, ·Chrmi.. 7·.' jiI.: bcih~'lU1·i8SELYS. r.: .. :· ', ... ~ .............. '.' Loo~Choo,Chilla. S; .Psolodesmlfs:·maiulrlrin'lis MCiLACHLAN~ .......·c.' ... Formosa; Chil'ia". 150 K. OGUMA. 9. P . d01'othca WILLIA~rsox ... , ,", .. , ". Loo-Choo, Formosa. 10. ..i"t.Fnais tenuis OGU)IA. , ...................... ' ............... Formesa. 11. JJ£evl'obasis cllinensis I JIXNNUS. , .. , .. Loo-Choo?, China, E. India. 12. E'uphaea jormos(( HAGEN ..... , .. ,' .................... Foemosa. 13. E. yayeyamana MATsmIUHA. ,.. ,., .... , ... , ..... ,.. Loo-Choo. 14. Bayadera hyalina SEJ.NS. .. ... ' ... ,................ ... Formosa. 15. Rhynocypha 14-1l1aculaia OGUMA ................... , .. Bonin Islands. 16. R. ogasawarensis J\'[ATSmIURA ........... Formosa, E. India. 17. ..ilEicrome1'us linea ius BURMEISTER. All of the palaearetic speciE's exhibit wide ranges of distribution in Japan proper, except the first which has not yet been fulmd ill Hoklwidll , most of them being noted for their beneficial influellce on the rice culture as they devour the injurious insects of the rice plants. Of the subtropical speciE'S Rhynocypha ogas(luxl1'ellsis occurs in the Bonin Islands only, and the rest are fonnd in Loo-Choo and in Formosa. 'The islands of Loo-Choo are of importance as regards the distribl.1tion of dl'agonflies, as in the case' of other insects, inasmuch a~ they form the con- . necting link or steppiilg stones between Formosa and Japan propel'. In Loo-Choo are found many species of this family which are also found in Formosa, but it is noteworthy that thl?r~ is no species common both to these islands and to ,Japan proper. The Formosa Strait on the other llllnd seems to form no barrier in the distribution of CalopterygidaE>, since the species are most frequently met with in Formo"a are also found upon the Asiatic continent. The channel called Bashi Channel which sparatcs Formosa from Philippine" however acts qnite cO:lltl'd1'Y, as fur as this Elmily is concerned; one is not able to fiild even a 'single species common to both islands' Though tiny in area, the Bonin Islands widdy scatterrd in the Pacific Oce!ll1 are also fam011s in consequence of their peculiar fauna, since PRY}~R collected the pretty butterlly, Lycaena ogasawaraf1lsis during his stay in Japan. I have two of the most peculiar spccies of dragonflies. from thosc islands, one of'tbelll belonging to the family Caloptcrygidae.The demarkatioll line which fcparates Loo-Choo from KillShill should be extended estward and JAPANESE DRAGONFLIE::l OF THE FAMILY CALOPTERYGIDAE. 151 must include the Bonin Islands in the region to which Loo-Choo and Formosa belong. The Kurile Islands and Saghalin can be disl'egarded in considering the distribution of Clliopterygidae, smce 110 single specimen has been obtained from those regions. I w;sh to t'xpress my sincerest thanks to Pro£ Dr. M. NL'\''1'SUMURA f r his constant aid and kind ad dces during my stndy on odonatology. My obligations are also due to Messel's UCHIDA, FUKUDA, YANO and KmIURA. for their kindness in putting thtir collections at my disposal. Key to the Japanese Calopterygidae. A Wings longer than abdomen, frons pr~jected forming a large tubercle. B 1\£1-3 and 1\1j arising from a single point on the AI'. fflic1'(Ymel·u8. BB M:-3 and 1\1J widely apart in the start ... Rhynocypha. AA 'Wings shorter than abdomen, frons not projected. B Body stout, with the coloration of a Gompll1ls. .. Pa[aeophlebia. BB Body slender like an Agrionid. C Subq uadn1llgle slightly bent at the arculns, 1\11_4 arising from the middle or upper part of' the latter. D Quadrangle and basal radial space crossed .... .., Euphaea. DD Quadrangle and basal radial space free from eross nernlres Bayaclera CC Snbquadrangle neady straight, M I_3 and M4 arising from the lower part of the arcnlus. D True pterostigma prC'sent. E Quadrangle with 10 or more cross llernlres P8olodcSIIlUS. EE Quadrangle with only 4 or 5 cross llenures ... J.lfnais. DD True ptcrostigma obse~t. E M2 and 1\1;1 bifurcated ... Kevrobasi8. EE M2 and M3 simple. F Basal space reticulated .. Jlatrona. FF Ba!'al space fl're from cross nernll'cs3 ' Calopteryx. 152 K. OGUMA. Order ODON A TA. Suborder ZYGOP TERA. Family CALOPTER YGIDAE. Genus Calopteryx LEACH. 1. Calopteryx virgo LINNEUS .. Libellttla virgo Linn., Syst. Nat.!. p. 545 (1758). Colopteryx j'aponica SEINS, SOIlOp. Calop. add. II. p. 3 (1869). Calopteryx virgo ?"ace j'aponica SELYS, Ann. Soc. Ent. Belg. XXVII. p. 128 (1883). Nom. Jap. Aoba-lombo. Loc. Homhiu, Shikoku?, Kiushiu. 2. Calopteryx cornelia SELYS. C'alopteryx comelia SELY:;, Synop. Calop. add. II. p. 4 (1867). Nom .•Jap. JJ1iyama-kawa-tombo. Loc. Hokkaiclo, HOIlShill, Shikoku?, Kiushin. 3. Calopteryx atrata SELYS. Caloptm'Yx atrata SELYS, SYllOp. Calop. p. 16 (1853). Nl:m. Jap. Hagu1'o-tombo. Loc. Hokkaido, Honshiu, Shikoku?, Kiushiu. Genus Matrona SELYS. 4. Matrona nigripectus SELYS. JIairona mgripectus SELYS, Synop. Calop. add. IV (1879). Nom. Jap. Taiwan-hagul'o-tombo., Loc. Formosa. 5. Matrona basilaris SELYS. J.£!tJ'Q1W basil(wis SELYS,.synop. Calop. p. 17 (1853). " " SELYS, Odon. Loo-Choo, p. 5 (1888). JAPANESE DRAGONFLIES OF THE FAMILY CALOPTEHYGIDAE. 153 Nom. Jap. Rittkiu-.'wguro-tombo: Loc. Loo-Choo. As has previously menthonf'd by SELYSl\ the form from Loo-Chooshows quite a different appearance compared with the typical form. It ,differs from the latter by its smaller size, and also by its thorax never having yellow parts but beeing greenish black and having no streaks on the l<iteral sutures. Not a single specimen assuming the typical feature of basilcl1'is has been collected from Loo-Choo. Genus Psolodesmus MCLAcHLAx. 6. Psolodesmus mandarinus J\:IcLASCHLAN. PsolodesmU8 l1la1Ubrinu8 McI~AXCHLAX, Trans. Ent. Soc. Lond. II. p. 167 (1870). ~om. Jap. 8hiroobi-kmva-Iombo. Loc. Formosa. The type specimen was first collected in Amoy, and afterwards HAGEl'/ showed that the Fame i'pecies occurs also in Formosa. There are three specimens in the collection of the entomological laboratory of the college, but unfortunately it is quite unknown to whom their collection is due. 7. Psolodesmus dorothea WILLIAMSO~. PsolodesJlw8 di"othea WILLLUIS0X, Ent. New. XV. pp. 247-250 (HlO!): Xom. Jap. Kinuba-kmva-lombo. Loc. Formosa (LOOllJIS, MATSUMURA). 7a. Psolodesmus dOl'othea kuroiwae MAT3UMURA. subsp. nov. Length of the abdomen '0 44mm. ~ 42mm. Length of the hind wing '0 37.:.40mm. ~ 3Znim. Length of the pterostigma '0 2.5mm. ~ 1.5mm. 1) Odon. Loo-Choo, p. 5. .154 K. OGUi\fA . This subspecies IS ea,i]y distinguiEl1abie from the type III the fbllowing points. 1. Size much smaller. 2. Head, thorax and 1-2 segments of the abdomen dull bron;.';, ,,,hile metallic green ill th:) type. 3. In the male, wings without pearly reflection, not smoked along the costa and the ap:cal opaque area highly reduced, only the small part beyond pterostigma brownish. In the :fi'ma~e, wings faintly smoked and the apical bpaque area being much ~malleI'. The lack of iridescent nature in the wings of males is the most important peculiarity to separate this sub3pedes from the type. It might sometimes be taken as a distinct species wheneyer the details are not sufficiently studied. Kom . .Tap. KU1'oiwa-kawa-tombo. Loc. Loo-Cheo (KUROIWA). Genus Mnais SELYS. Thrce speCIes belonging to the present genu~ ha\'e been known to (lCCtH· ill ,Tapan, 'Liz. JJl1wis strigata, Jljnais }Jl'uinos(t and ~Vn((is costaZis. All of tl1('~l were first describ2d hy SELYS although the first had been authorized 1 by HAGEx; to SELYS, howeyer, the femels ) of the last two were utterly unknown. By comparing the wing color only, theSe three, if be males, are easily distinguishable each othel', but whene\'er we intend to sparate them by the femaleil only, then we always find much perplexity thereon. They 11Iwe, ill the ;females, the wings of similar color, so they ha\'e a similar appearance to the males of .ilfnais strigata except the ('0101' of pterostigma. The three species li\'e nlways in the same places, at least 1II. sl1'igata ]If. consiaZi8, in my observation, ~linglillg each other along stream" conseqnently whene\'er the one is fOllnd the other can whithollt exception be met with.
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